Improvement in blind-slat workers



E, C. WHIPPLE.

' BLIND sun WORKER. v No.189 ,292.' Patented Apri1 3,1877.

' /ZZWCZ /M I N-PETERS, PHQTO-LITHOGRAPHER, WASHINGTON h c.

'. EDMUND oQwniP-Pim, 0 je t me a;ism;*

imPri'dl EMENm-N Bl-lNDisLATwQRKfiRSt Specification forming part LettersPatent No. ISQJAQ Qdated April 3,1577; applicationfiled 7 January 27,1877.

To all whom it may concern:

Be it known that I, EDMUND G. WHIIPLE, of the city of Davenport, in thecounty of Scott and State of Iowa, have invented certain new and usefulImprovements in Blind- Slat Workers, of which the following is aspecification In the accompanying drawings, Figures 1 and 2 areperspective views, partly in section, of my improved blind-slat workerand Fig. 3 is a plan view of the locking-lever.

My invention consists in the novel construction, combination, andarrangement of a blindslat worker, consisting of a double-crank leveractuating a plate having a segmental slot in a vertical directionrigidly connected with a blind-slat rod, or a series of such rodsrigidly connected together with a locking-lever of peculiarconstruction, so arranged that the blinds may be held open or closed atany de- I sired point, and also to lock said blinds closed together withthe window sash or frame, as will be hereinafter more fully describedand definitely claimed.

A is the window-frame; B, the sash; O, the blinds, and D, theblind-slats, the workingrods d of which are connected together by meansof a couplingsleeve, cl, or other rigid connection, when the blind-slatsare arranged in two sections in the blind-frame, as is frequently thecase, and as shown in Fig. 1. The lower end of the slat-rod d isprovided with a downwardly-projecting plate, E, forming practically anextension of the rod 01. This plate E is provided with a segmental slot,0, traveling on a pin, 0, made fast to and projecting from theblind-frame O. The are of the circle described by the slot 0 is anarcofthe circle described by the crank-lever F, to impart a verticalreciprocating motionto the rod (1 and the blind-slats as the crank-leveris turned to the right or left. The lower end of the plate E has aperforation, c, for the reception of the operating or working shank f ofa double-crank lever, F, the shaft f of which may be supported uponbearing-rods f one in close proximity to the plateE,and

the other within a recess in the parting-strip upon the sill A 5 or thesill may be suitably recessed to receive the shaft 1, and the outercrank F of the double-crank lever F, as well as the lower extremity ofthe slotted plate E. In this manner the crank-shaft may be laid flushwith the sill, its handle projecting from the parting-strip on suchsill, or the shaft, passing clean over the width of the sill, bring ingthe handle thereofto itsinner edge; but,for reasons hereinafterexplained, I prefer to have the crank-handle F of the lever F 'projectfrom the parting-strip on the sill A. Upon the parting-strip G isaffixed a slotted plate, H, through the slot -hof which the crankhandleF of the double-crank lever F projects. The plate H is sufficientlyraised from the face of the inner strip G to permit the lever L to passbetween said plate and the face of the strip; or the strip may berecessed, and the plate and lever arranged as shown in Fig. 2. Thislever L is pivoted at one end, 1, to the face of the strip Gr, or Withina recess, g, as in Fig. 2, the free end of such lever being in the formof a toothed sector or segment, Z, considerably enlarged, and the shankis recessed, as at 1 immediately behind the toothed segmental portion,the latter serving to lock the lever F into any desired position, andconsequently hold or look the blind-slats into a relative position moreor less open. The recess Z serves to lock the blind-slats closed, sothat they cannot be opened from the outside. The segmental portion 1being considerably enlarged, will pass beyond the parting-strip, whenthe arm of the crank F is withinthe recess l and penetrate within aslot, 1), formed for its reception in the sash B, as shown by Fig. 2. Inthis manner the blind-slats and sash are locked simultaneously. Theshank f of the crank F of the operating-lever F is free to enter orleave the perforation of the slotted plate E, so that the blinds may bereadily opened or closed when desired.

From the description of the devices as above given, the working thereofmay be readily understood without further explanation.

Having described my invention, whatI claim, Y

and desire to secure by Letters Patent, is-

l. The blind-slat rod (1, or a series of such rigidlyconnected-together, the plate or extension E having a segmental slot, 0,in a vertical direction, the guide-pin c, and the double-crank lever 13,all combined, constructed, and operating substantially as and forthepurpose set forth.

2. In a blind-slat worker, the combination of the crank-arm F of thedouble-crank lever" F with the segmental toothed enlargement l on thepivoted locking-lever L, all constructed and operating substantially asdescribed, for the purpose specified. p v

3. In a combined blind-stop and sash-fastener, the combination of thecrank-arm F? of the double-crank lever F and the sash-frame,

provided with a slot or recess, b, with the segmental enlargement l andthenotchor recess 1 on the pivoted locking-lever L, all arranged,

constructed, and operating substantially as described, for the purposesspecified.

In Witness that I claim the foregoing I have hereunto set my hand this23d day of January,

